| 1 | Revision history for IO::AIO |
1 | Revision history for IO::AIO |
| 2 | |
2 | |
| 3 | TODO: better autoconf.pm that can return LIBS etc. |
3 | TODO: scandir - some dirs mostly contain subdirs - invert logic? |
| 4 | TODO: aio_cptree/mvtree |
4 | TODO: aio_cptree/mvtree |
| 5 | TODO: reduce condvar fairness: schedule hot-cache-threads first? |
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| 6 | TODO: splice/tee/vmsplice? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/) |
5 | TODO: vmsplice? (http://kerneltrap.org/node/6505 http://lwn.net/Articles/178199/) |
| 7 | TODO: aio_fcntl, at least for file-locking |
6 | TODO: getxattr, setxattr, listxattr, removexattr etc.? |
| 8 | TODO: fallocate, if it wouldn't be so useless. |
7 | TODO: emulation for splice? |
| 9 | TODO: IO::AIO::mmap? aio_mincore? |
8 | TODO: syncfs/sync windows: |
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9 | TODO: posix_fallocate when flags=0 |
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10 | http://stackoverflow.com/questions/65170/how-to-get-name-associated-with-open-handle/5286888#5286888 |
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11 | http://blogs.msdn.com/b/adioltean/archive/2005/04/16/408947.aspx |
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12 | http://msdn.microsoft.com/en-us/library/aa366789%28v=vs.85%29.aspx |
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13 | http://msdn.microsoft.com/en-us/library/windows/desktop/aa366789%28v=vs.85%29.aspx |
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14 | http://msdn.microsoft.com/en-us/library/windows/desktop/aa364425%28v=vs.85%29.aspx |
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15 | http://msdn.microsoft.com/en-us/library/windows/desktop/aa364963%28v=vs.85%29.aspx |
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16 | http://msdn.microsoft.com/en-us/library/windows/desktop/aa364996%28v=vs.85%29.aspx |
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17 | http://msdn.microsoft.com/en-us/library/windows/desktop/aa364994%28v=vs.85%29.aspx |
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18 | TODO: extra socket/tcp constants &c? |
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19 | TODO: name_to_handle_At + open_by_handle_at = clone fds |
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20 | TODO: lchown |
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21 | TODO: ioprio_get/set |
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22 | |
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23 | TODO: rewrite rmtree et al. to support working directories (also speed them up) |
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24 | TODO: maybe IO::AIO leaks fds when requests are cancelled? maybe initialise result to -1? |
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25 | TODO: aio_wd should use O_PATH on linux, due to lacking O_SEARCH (http://comments.gmane.org/gmane.linux.file-systems/33611) |
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26 | http://www.openwall.com/lists/musl/2013/02/23/4 |
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27 | TODO: FIDEDUPERANGE, file_ioctl.c |
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28 | TODO: mincore |
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29 | TODO: SOCK_CLOEXEc etc. |
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30 | TODO: unlinkat flags, linkat flags, statat, renameat2 flags |
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31 | TODO: https://kernelnewbies.org/Linux_4.11 |
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32 | TODO: define useful rules for [[$wd, $path], $path] &c and implement them |
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33 | TODO: https://github.com/coreutils/coreutils/blob/master/src/stat.c maybe IO::AIO::FSID |
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34 | TODO: mlock2, MLOCK_ONFAULT |
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35 | TODO: dup3, pipe2, accept4 |
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36 | TODO: dump config.log when automated testign and configure fails |
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37 | TODO: ns time resolution in utime |
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38 | TODO: statx |
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39 | TODO: aio_fchdir/chdir? emulate chdirat? |
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40 | TODO: rt-4.0.18-20109-1573826674-1229.126277-5-0@rt.cpan.org |
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41 | TODO: aio_splice, aio_tee |
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42 | TODO: copy_file_range |
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43 | TODO: write more abpout the thread model, maybe bump some defaults? |
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44 | TODO: io_uring, but it's so broken :/ |
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45 | TODO: allow import of fds as aio_wd |
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46 | TODO: close_range |
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47 | TODO: move_mount, open_tree, fsmount, fspick, fsconfig, fsopen https://lwn.net/Articles/759499/ |
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48 | |
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49 | 4.80 Sat 01 Apr 2023 04:13:37 CEST |
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50 | - remove long obsolete "paths must be absolute" text in aio_open/stat |
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51 | descriptions. |
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52 | - another workaround for the low-quality musl libc. |
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53 | - test for umount seperately, as it is more portable. |
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54 | - some low-quality posix attempts (openbsd, osx) declare the availability |
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55 | of fexecve but then don't even bother to implemnent a stub. |
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56 | |
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57 | 4.79 Sun 25 Sep 2022 18:25:53 CEST |
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58 | - the autoconf result of the mount check was not used, so it failed to |
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59 | compile on most systems (reported by crackoff@tutanota.com). |
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60 | - work around fedora not having a working C compiler setup by design |
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61 | (reported by Paul Howarth). |
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62 | |
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63 | 4.78 Tue 06 Sep 2022 12:54:43 CEST |
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64 | - add IO::AIO::mount and IO::AIO::umount. |
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65 | - add a bunch of symbols from sys/mount.h. |
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66 | |
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67 | 4.77 Mon 05 Sep 2022 02:03:38 CEST |
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68 | - add MFD_HUGETLB_2MB and MFD_HUGETLB_1GB constants. |
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69 | - add fexecve. |
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70 | - add lots of missing functions to @EXPORT_OK. |
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71 | |
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72 | 4.76 Tue Jul 27 20:45:01 CEST 2021 |
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73 | - add autoconf test for siginfo_t, which is, of course, not |
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74 | available on windows (reported by Peter Petky). |
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75 | - disable syscalls on solaris, as perl seems to provide an |
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76 | incompatible syscall prototype that clashes with sys/syscall.h. |
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77 | - add MAP_FIXED_NOREPLACE, MAP_SHARED_VALIDATE, MAP_SYNC and |
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78 | MAP_UNINITIALIZED. |
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79 | |
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80 | 4.75 Wed Dec 30 08:44:55 CET 2020 |
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81 | - removed leftover debug output from treescan. |
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82 | - added (but not documented) waitid-P_*, FSPICK_*, FSOPEN_*, |
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83 | FSCONFIG_*, MOUNT_ATTR_* constants. |
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84 | |
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85 | 4.74 Tue Dec 29 16:19:28 CET 2020 |
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86 | - added pidfd_open, pidfd_getfd and pidfd_send_signal functions. |
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87 | - rework bin/treescan to avoid recursion. This fixes two bugs |
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88 | where a deep directory traversal or a lot of command line |
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89 | arguments could cause it to crash. |
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90 | - added (but not documented) open_tree, AT_* and move_mount flags. |
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91 | - support defining syscall numbers in gendef0. |
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92 | |
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93 | 4.73 Fri Dec 4 02:08:37 CET 2020 |
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94 | - def0.h was not uptodate, running into musl problems |
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95 | (reported by B Fraser). |
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96 | - IO::AIO::splice and IO::AIO::tee didn't properly return |
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97 | 64 bit values. |
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98 | - added IO::AIO::accept4. |
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99 | - add various F_SEAL related fcntl constants. |
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100 | - removed experimental marker for fdlimit functions. |
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101 | - fiemap now includes the last segment even if it overflows |
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102 | the end offset, which is arguably the correct behaviour. |
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103 | |
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104 | 4.72 Wed Apr 3 04:56:03 CEST 2019 |
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105 | - (libeio) if fd 0 is available do not use it for aio_wd, as it |
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106 | collides with IO::AIO::CWD. |
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107 | - added IO::AIO::memfd_create. |
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108 | - correctly include <sys/uio.h> in the vmsplice test. |
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109 | - reduce codesize by ~7% on amd64 by declaring more functions |
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110 | as noinline. |
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111 | - documentation fixes and updates. |
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112 | - experimental and undocumented preliminary support for synchronous statx. |
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113 | |
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114 | 4.71 Sun Mar 10 13:09:26 CET 2019 |
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115 | - due to an error in the linux manpages, the configure tests |
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116 | for readahead, sync_file_range, splice etc. failed. This has been fixed. |
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117 | |
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118 | 4.7 Mon Mar 4 11:28:13 CET 2019 |
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119 | - majorly speed up scandir for the very special case of a non-POSIX |
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120 | filesystem that nevertheless reports valid dt_type information. |
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121 | The only known filesystem of this type is currently btrfs, which |
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122 | didn't get it's act together to implement POSIX semantics in all |
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123 | these years, and I am tired of waiting. |
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124 | - add IO::AIO::MCL_ONFAULT for mlockall, add IO::AIO::mlockall. |
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125 | - neither sys/mkdev.h nor sys/sysmacros.h were included, even when they |
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126 | were detected by autoconf. |
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127 | |
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128 | 4.6 Sat Aug 25 21:58:36 CEST 2018 |
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129 | - add st_btime, st_btimesec, st_btimensec and st_gen accessors, |
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130 | mostly for bsds which expose birthtime and st_gen members (netbsd, freebsd |
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131 | but only st_gen on openbsd because they compiled their perl without support |
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132 | for birthtimes). |
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133 | - fix madvise and munlock to properly support negative offsets. |
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134 | - allocate fd for the aio_close at boot time, to guarantee it working |
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135 | later, rather than calling abort when it fails. also avoids |
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136 | close-on-exec race issues after module load. |
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137 | - #undef utime on win32, maybe this helps some reports of utime hangs. |
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138 | - minor doc improvements. |
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139 | - minor configure cleanups. |
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140 | - use $Config{perllibs} instead of libs for configure. might help people |
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141 | who didn't install all perl dependencies (might break things as well). |
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142 | |
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143 | 4.54 Tue Aug 14 13:54:48 CEST 2018 |
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144 | - include sys/mkdev.h or sys/sysmacros.h if available. |
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145 | - further tweaks to configure invocation for systems requiring --rpath. |
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146 | - no longer rely on custom paths on win32 platforms. |
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147 | - try to work around buggy PAGESIZE macro on solaris. |
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148 | |
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149 | 4.53 Tue Aug 14 11:27:50 CEST 2018 |
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150 | - add $Config{libs} to LIBS for configure, to work around systems |
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151 | with broken library dependencies (... openbsd). |
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152 | |
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153 | 4.52 Sun Aug 12 08:09:45 CEST 2018 |
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154 | - config.h.in was missing in distribution. |
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155 | |
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156 | 4.51 Sun Aug 12 07:24:14 CEST 2018 |
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157 | - complete rework of the autoconf framework: IO::AIO now uses its own |
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158 | config.h, separate from libeio, and tries to test the actual perl |
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159 | environment, not the standard system environment. |
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160 | - provide nanosecond-accracy stat time accessors for both perl and IO::AIO |
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161 | stat functions. |
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162 | - removed non-portable C++ syntax from eio.c. |
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163 | - try to fix readdir tests on cygwin spuriously failing. |
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164 | |
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165 | 4.5 Wed Aug 1 00:23:55 CEST 2018 |
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166 | - aio_mtouch touch all pages as requested, not just the first page in most cases. |
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167 | - new function: IO::AIO::mremap, linux-specific mremap, with constants MREMAP_MAYMOVE |
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168 | and MREMAP_FIXED. |
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169 | - add O_ACCMODE. |
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170 | - add (undocumented) MSG_CMSG_CLOEXEC and SOCK_CLOEXEC constants. |
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171 | |
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172 | 4.4 Tue Feb 20 07:54:12 CET 2018 |
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173 | - new aio_slurp request. |
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174 | - add (experimental) IO::AIO::eventfd and timerfd* function. |
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175 | - add (experimental) IO::AIO::get_fdlimit and IO::AIO::min_fdlimit. |
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176 | - point out that aio_copy overwrites existing files. |
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177 | - removed filesystem magic number table from aio_statvfs docs as |
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178 | statvfs doesn't actually return this info at all (statfs does). |
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179 | - add a bunch of (mostly linux-specific) constants for use in ioctls |
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180 | (see aio_ioctl docs). |
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181 | - treescan now has a proper manpage and useful --help output. |
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182 | - new option --sync in treescan, to sync everything in a subtree. |
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183 | - changed default for aio_msync flags to MSYNC_SYNC. |
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184 | - document offset/length behaviour of mprotect/madvise. |
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185 | - support linux's renameat2 (via aio_rename2). |
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186 | - add aio_rename2, an aio_rename with flags. |
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187 | - add F_DUPPFD_CLOEXEC, F_OFD_[SG]ETLKW? constants. |
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188 | - add FALLOC_FL_INSERT_RANGE, FALLOC_FL_UNSHARE_RANGE. |
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189 | - (libeio) use posix_close if available. |
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190 | - (libeio) internal close() calls no longer disturb errno. |
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191 | - add IO:AIO::FALLOC_FL_UNSHARE. |
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192 | - update schmorp.h for removal of USE_SOCKETS_AS_HANDLES |
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193 | and better eventfd detection. |
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194 | |
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195 | 4.34 Sun May 1 19:18:24 CEST 2016 |
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196 | - def0.h was not properly generated during previous release, causing |
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197 | compile errors on various platforms. |
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198 | - major/minor were accidentally switched (reported by Alexander Lishenyuk). |
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199 | - removed duplicate definition of MAP_HUGETLB, that was found due to |
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200 | a bug in Perl::Tidy (testcase by alaska332@gmail.com). |
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201 | - added (untested!) aio_fcntl, aio_ioctl requests. |
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202 | - (libeio) names set via prctl are truncated to 15 chars + nul, not 16, |
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203 | as manpages-dev originally claimed. |
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204 | |
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205 | 4.33 Mon Jan 18 12:50:10 CET 2016 |
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206 | - add IO::AIO::pipe2 function. |
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207 | - added support for FALLOC_FL_COLLAPSE_RANGE and FALLOC_FL_ZERO_RANGE |
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208 | constants. |
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209 | - added support for O_TMPFILE and O_PATH constants. |
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210 | - added support for MAP_FIXED, MAP_GROWSDOWN,MAP_32BIT, MAP_HUGETLB, MAP_STACK |
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211 | consdtants, whether they can be sensibly used or not. |
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212 | - use NO_INIT where applicable. |
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213 | - update libecb. |
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214 | - added stability canary support. |
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215 | - updated linux super magic table to 4.3.3. |
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216 | |
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217 | 4.32 Wed Feb 11 20:32:11 CET 2015 |
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218 | - replace off_t by STRLEN where appropriate, should not result in |
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219 | user-visible changes. |
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220 | - update ecb.h for C11 compatibility. |
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221 | |
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222 | 4.31 Tue Jun 3 03:29:27 CEST 2014 |
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223 | - work around more 5.20 bugs. backwards compatibility my ass. |
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224 | |
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225 | 4.3 Fri Apr 11 06:22:38 CEST 2014 |
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226 | - perl5porters broke Async::Interrupt, BDB, EV, IO::AIO, OpenCL |
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227 | without warning by switching the meaning of USE_SOCKETS_AS_HANDLES |
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228 | in 5.18. What's so attractive about giving a shit about backwards |
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229 | compatibility - I will never understand. |
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230 | |
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231 | 4.2 Sat Jan 25 01:13:14 CET 2014 |
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232 | - aio_group could corrupt memory because it didn't restore |
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233 | the stack after req_submit. |
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234 | - be more careful on (e.g. permission) errors in bin/treescan. |
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235 | - work around changes in ExtUtils::MakeMaker. |
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236 | - (libeio) implement aio_realpath for win32. |
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237 | - (xthread) work around compile time bugs in ptw32. |
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238 | - added IO::AIO::pipesize. |
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239 | - (libecb) insignificant update. |
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240 | |
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241 | 4.19 Sun Jan 6 12:47:26 CET 2013 |
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242 | - avoid endless loop in fiemap with some XFS files. |
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243 | - in aio_rename and aio_rmdir, specialcase the case of [$wd, "."] |
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244 | and call rename/rmdir instead of renameat/unlinkat. |
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245 | |
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246 | 4.18 Thu Oct 11 07:01:26 CEST 2012 |
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247 | - fix unintended xthread_create by intentionalising it :) |
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248 | |
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249 | 4.17 Thu Oct 11 05:19:47 CEST 2012 |
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250 | - rename aio_fallocate to aio_allocate, to match documentation. |
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251 | - add list of linux fsid values to aio_statvfs docs. |
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252 | - work around a bug in btrfs' FIEMAP ioctl implementation. |
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253 | - work around AIX bug: statvfs.f_fsid is a struct, not unsigned long |
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254 | as per unix spec. |
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255 | |
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256 | 4.16 Tue Aug 14 05:39:03 CEST 2012 |
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257 | - aio_statvfs was wromgly marked for wd emulation, causing |
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258 | it to malfunction for paths. |
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259 | - fix a crash in aio_fiemap, when used on ranges without any |
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260 | extents. |
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261 | - work around linux kernel bug (at least in 3.2): kernel might |
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262 | trash fiemap input arguments. |
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263 | - work around linux kernel bug (at least in 3.2): kernel does not |
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264 | set FIEMAP_EXTENT_LAST on last segment. |
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265 | - work around linux kernel bug (at least in 3.2): kernel silently |
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266 | truncates segment count if a file. |
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267 | - make fh argument of IO::AIO::mmap optional, also add mmap/munmap |
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268 | to quick overview. |
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269 | - splice can corrupt data. |
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270 | - (libeio) remove pread/pwrite emulation. |
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271 | - do not grow mmaped scalars in aio_read. |
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272 | - add FALLOC_FL_PUNCH_HOLE and document fallocate. |
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273 | - provide pread/pwrite for win32, making it link again on native win32. |
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274 | |
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275 | 4.15 Tue Apr 10 06:59:00 CEST 2012 |
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276 | - always include linux/types.h for fiemap, for compatibility to |
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277 | ancient systems (Paul Howarth). |
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278 | - experimental support for IO::AIO::splice and ::tee (no aio_...). |
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279 | - provide SEEK_HOLE and SEEK_DATA, if available. |
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280 | - work around (again!) an immensely stupid bug in RHEL, defining |
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281 | autoconf macros in linux system headers (analysed by Paul Howarth). |
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282 | |
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283 | 4.14 Sat Apr 7 02:45:18 CEST 2012 |
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284 | - fix stat structure usage on windows, which caused bogus stat results. |
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285 | - (libeio) make readahead emulation behave more like actual readahead by never failing. |
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286 | - new request aio_seek. |
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287 | - new request aio_fiemap. |
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288 | - autogenerate the #ifdef/#define 0 blocks for symbols we export. |
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289 | |
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290 | 4.12 Fri Dec 30 08:51:25 CET 2011 |
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291 | - realpath would return a random value if the name was too long, |
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292 | instead of -1. |
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293 | - port to c89. |
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294 | |
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295 | 4.11 Mon Oct 10 00:24:11 CEST 2011 |
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296 | - libeio didn't compile on !linux (Paul Howarth). |
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297 | |
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298 | 4.1 Sun Oct 9 10:24:11 CEST 2011 |
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299 | - IO::AIO did access uninitialised memory on unsuccessful stats. |
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300 | - (libeio) added syncfs syscall wrapper. |
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301 | - (libeio) set thread name on linux (ps -L/Hcx, top, gdb). |
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302 | - (libeio) support multiple indepenent working directories. |
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303 | - applied speling corrections by Nicholas Bamber. |
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304 | - tune treescan #threads and #outstanding requests a bit. |
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305 | - reduce the number of file descriptors in use at any one time |
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306 | in treescan, to avoid running out of them (and using too much ram). |
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307 | - take advantage of working directoriy abstractions |
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308 | in aio_scandir and treescan. |
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309 | - reduce compiled size by ~10% by not inlining some key functionality. |
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310 | - added --progress switch to treescan. |
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311 | |
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312 | 4.0 Mon Jul 18 05:01:10 CEST 2011 |
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313 | - INCOMPATIBLE CHANGE: fork is no longer supported (indeed, it never was), |
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314 | see FORK BEHAVIOUR in manpage for details. |
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315 | - passes testsuite on win32 now and may actually work |
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316 | (activestate 5.10.1 / MSVC6, YMMV). |
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317 | - (libeio) fix a deadlock where a wakeup signal could be missed when |
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318 | a timeout occured at the same time. |
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319 | - (libeio) added realpath. |
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320 | - (libeio) added fallocate. |
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321 | - (libeio) disabling sendfile on darwin unfortunately broke the emulation. |
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322 | - (libeio) do not acquire any locks when forking. |
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323 | - (libeio) use fewer time() syscalls when waiting for new requests. |
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324 | |
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325 | 3.93 Wed Jun 29 23:44:18 CEST 2011 |
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326 | - ECB.H WAS MISSING. |
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327 | |
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328 | 3.92 Wed Jun 29 14:45:41 CEST 2011 |
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329 | - ecb.h was missing. |
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330 | |
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331 | 3.91 Wed Jun 29 13:24:42 CEST 2011 |
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332 | - (libeio) work around a Linux (and likely FreeBSD and other |
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333 | kernels) bug where sendfile would not transfer all the requested |
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334 | bytes on large transfers, using a heuristic. |
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335 | - buggy sendfile caused aio_move/copy to sometimes fail for big |
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336 | files (fortunately it checks that the whole file has been |
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337 | transferred...) |
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338 | - use libecb for higher performance and higher portability. |
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339 | - (libeio) disable sendfile on darwin, it's too broken. |
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340 | - disable fork tests on !linux, as only linux supports mixing |
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341 | pthread and fork in perl. |
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342 | - document the fact that fork doesn't work anymore when using |
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343 | this module, on anything !GNU/Linux. |
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344 | - increase timeout in t/04_fork.t, as too many CPAN-tester setups |
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345 | run on a 0.1MHz cpu. Or so. |
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346 | |
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347 | 3.9 Fri May 27 02:43:47 CEST 2011 |
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348 | - (libeio) fix memory corruption in aio_readdirx for the flags |
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349 | combination READDIR_STAT_ORDER | READDIR_DIRS_FIRST. |
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350 | - add lots of newer POSIX and GNU/Linux-specific open |
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351 | flags. |
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352 | |
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353 | 3.8 Sun Mar 27 12:25:33 CEST 2011 |
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354 | - use nonstandard but maybe-working-on-bsd fork technique. |
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355 | - support a max_idle value of 0. |
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356 | - support setting of idle timeout value (IO::AIO::idle_timeout). |
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357 | |
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358 | 3.72 Fri Feb 11 04:25:38 CET 2011 |
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359 | - use _POSIX_MEMLOCK_RANGE to detect mlock/munlock. |
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360 | - aio_mknod always used a dev_t value of 0. |
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361 | - new treescan option: --grep. |
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362 | - add more S_IF macros, and major/minor/makedev "macros". |
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363 | |
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364 | 3.71 Thu Dec 30 08:18:46 CET 2010 |
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365 | - the numerical result value passed to callbacks did not stringify |
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366 | correctly, due to internal reuse and failure to reset the sv flags. |
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367 | - actually test for posix_[mf]advise, as at least uClibc defines |
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368 | _POSIX_ADVISORY_INFO without actually having any of the required |
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369 | funcitonality. ugh. |
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370 | |
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371 | 3.7 Mon Nov 1 23:00:34 CET 2010 |
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372 | - implement/add madvise, mmap, munmap, aio_mlockall, munlockall, |
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373 | aio_mlock, munlock, msync and mtouch to @EXPORT_OK. |
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374 | - document the sad state of affairs w.r.t. pthread on many bsds. |
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375 | - do not enable mmap on systems without _POSIX_MAPPED_FILES |
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376 | (openbsd 4.8). |
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377 | - do not leak memory in IO::AIO::mmap when the scalar already |
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378 | had string-data. |
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379 | - add O_RDWR, O_APPEND and O_EXCL symbols and semi-document |
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380 | them. |
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381 | - cache the result IV, for a minor speedup in the common case. |
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382 | - croak when an mmapped-scalar changes location, to detect |
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383 | user-errors better. |
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384 | - fix aio_readlink prototype. |
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385 | |
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386 | 3.65 Wed Mar 31 02:45:05 CEST 2010 |
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387 | - actually use PATH_MAX instead of NAME_MAX for readlink, as to not |
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388 | cut off long pathnames in aio_readlink (based on patch by |
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389 | Rasmus Andersson). |
|
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390 | - a double fork partially killed the event pipe (great testcase |
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391 | by dormando). affects IO::AIO, BDB and Async::Interrupt. |
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392 | - suck steve's dick and rename our symbols to avoid colliding |
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393 | with nonstandard identifier spam on the broken os x pseudo-os. |
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394 | affects IO::AIO and BDB. |
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395 | |
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396 | 3.6 Mon Jan 11 00:43:39 CET 2010 |
| 11 | - (libeio) more fixes for the freebsd/apple sendfile - broken by |
397 | - (libeio) more fixes for the freebsd/apple sendfile - broken by |
| 12 | manpage standards, but apparently correct accoridng to actual |
398 | manpage standards, but apparently correct accoridng to actual |
| 13 | kernel sources. |
399 | kernel sources. |
|
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400 | - add IO::AIO::mmap/munmap support. |
| 14 | - add IO::AIO::m(un)lockall support. |
401 | - add IO::AIO::m(un)lockall support. |
|
|
402 | - clean up manpage. |
| 15 | |
403 | |
| 16 | 3.5 Thu Jan 7 21:25:04 CET 2010 |
404 | 3.5 Thu Jan 7 21:25:04 CET 2010 |
| 17 | - (liebio) fix freebsd sendfile (Vanilla Hsu). |
405 | - (liebio) fix freebsd sendfile (Vanilla Hsu). |
| 18 | - (libeio) also fix darwin sendfile that suffered from a similar bug. |
406 | - (libeio) also fix darwin sendfile that suffered from a similar bug. |
| 19 | - add aio_statvfs as interface to statvfs/fstatvfs. |
407 | - add aio_statvfs as interface to statvfs/fstatvfs. |
